As with the transfer of Robin van Persie in 2012, they do not wish to strengthen their rivals in spite of Vermaelen's indifferent form in recent seasons.

United are mindful of the real figures Barcelona present as opposed to some that are being leaked; they will pay a reasonable value but believe the player will, like Van Persie, ask to join them ahead of Luis Enrique's Barca.

Vermaelen's days at the Emirates Stadium are numbered after he played just 14 times in the Premier League for Wenger's side last season.

He isn't training with the Gunners at the moment because of a niggling hamstring injury and it remains unclear as to where he'll be playing his football this year.

In to the final year of his contract, Vermaelen is almost certain to leave the club. Barcelona have lodged a bid of around £10million.